Speed-regulator for explosive-engines.



No. 674,580. Patented May 2|, l90l. H. J. HARTIG.

SPEED REGULATOR FOB EXPLOSIVE ENGINES.

(Application filed Apr. 30, 1900.)

(No Model.)

I 0 WITNESSES I 3/ ,3

TOR

UNITED STATES PATENT FFICE.

HENRY J. HARTIG, OF BROOKLYN, NEW YORK.

SPEED-REGULATOR FOR EXPLOSlVE-ENGINES.

SPECIFICATION forming part of Letters Patent No. 674,580, dated May 21, 1901.

' Application filed April 30, 1900. Serial No. 14,795. (No modeld 'i'o (ZZZ whom it may concern.-

Be it known that I, HENRY J. HARTIG, a citizen of the United States, residing in the borough of Brooklyn, cityof New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in Governors for Gas and Gasolene Engines; and I do hereby declare the following to be a full, clear, and exact description,

of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has relation to governors for gas and gasolene engines or explosive-engines of other kinds, and especially to that variety of governors now commonly called pendulum or inertia governors, though frequently known under the name of hit-andmiss governors.

The object of my invention is to provide or produce a simple, cheap, efficient, and reliable governor of the class above named for use in the situation indicated and to operate in connection with the exhaust-valve of the engine,aifording facilities foradjusting, accessibility of all parts, and means for locking the regulating-spring. To accomplish all of this and to secure other and further advantages in the matters of construction, operation, and use, my improvements involve certain new and useful arrangements or combinations of parts and peculiar features of construction, as will be herein first fully described and then pointed out in the claim.

In the accompanying drawings, forming part of this specification, Figure 1 is a side view, partly in section and partly in elevation, representing my improved form of governor and its operating connections with the exhaust-valve of a gas or similar engine. Fig. 2 is a side elevation of a part of the governor corresponding with Fig. 1. Fig. 3 is a back view of the exhaust-chamber as it would appear it the cap shown in Fig. l were omitted, showing the valve and the exhaust-port leading from the cylinder.

In all the figures like letters of reference,

wherever they occur, indicate corresponding parts.

A represents the cylinder of any gas or other explosive engine, and B is the exhaustvalve thereof. In the form shown this valve is seated in the back of the exhaust-chamber C,'into which the products of combustion or of explosion find entrance only through the port governed by the exhaust-valve, proceeding from the interior of the cylinder through a suitable opening, as a, which is guarded by a removable cap D. The particular arrangement of the exhaust-valve is, however, of no importance and may be varied at pleasure, the example selected being intended to illustrate only an operative form. From the eX- haust-chamber the products of the explosion are to be conducted away as may be desired.

E is the rod by which the governor-block is reciprocated in a fixed path and is moved by suitable connections of any character with the moving parts of the engine. These connections are not shown, as they form no part of the present invention. They are usually timed with respect to the movements of the engine-piston, so that it will move back and forth twice before it is possible for the governor to permit the recharging of the cylinder, and the governorautomatically regulates the recharging according to the speed of the engine.

F is the stem of the exhaust-valve, which stern projects through to the exterior of its casing and is there supplied with a suitable spring, as 19, between said casing and a out 8 on the stem and calculated to hold the valve to its seat under any conditions unless the valve is purposely opened to secure the proper and timely operations of the engine. 1

G is alever pivoted as at 0, its lower end being arranged to be moved when hit by the pushblade at proper times or allowed to remain stationary when missed by the push-blade, and its upper end is preferably provided with a short. tappet or striking-piece, as e, which being brought into contact with the end of stem F forces the latter inward, and thereby opens the exhaust-valve B. A spring d surrounds the tappet e and the extremity of the stem F and stands between the not .9 and the upper end of the lever Gr, so as to hold these members normally separated with a force depending upon the adjustment of the nut. Such adjustment also regulates to an extent the opening of the valve B, for when the spring is under very slight tension the valve will not be opened until the tappet strikes the stem; but when the spring is placed under greater tension the approach of the upper end of the lever toward the stem will slightly unseat the valve, or at least will so loosen it on its seat that it can open easily, and thereafter as soon as the tappet strikes the stem the valve will be opened positively and quickly.

H is the block or foundation-piece of the governor, the same being fitted to receive the rod E and to-be securely locked thereon at the point to which adjusted by suitable setscrews, asff.

I is the weight or pendulum, which is provided with a yoke by which it is hung upon block H and which extends forward ofthe pivot or axis and reaches across the block and under the push-blade. The vertical arms of the yoke are represented at g g, the hori- Zontal arms at h h, the cross-piece at 2', and the axis, at k.

K is the push-blade of the governor, the same being secured upon or having a hingeblock L, of which the hinge-pin Zserves to connect it with block H, so that the push-blade is free to move upon its hinge-pin, being raised at its free end only by the cross-pieced of the yoke on which it rests and dropping at its free end by its own gravity when the yoke is swung in the proper direction by the weight I. In the particular position shown in Fig. 1 the push-blade will engage lever G when sufficiently advanced and will through it effect the opening of the exhaust-valve. The blade is made to assume this position whenever the governor travels slowly enough; but upon an increase of speed the inertia of the weight I is sufficient to cause it to swing on its axis is, thereby lowering the outer ends of arms h h and permitting the push-blade to swing down clear of the lower end of lever G. This leaves the exhaust-valve B seated, in consequence of which the next instroke of the piston can only compress the confined products of the explosion,and the succeeding outstroke will therefore not draw in a fresh supply of gas, as will be readily understood by users of this class of engines. The result is that the travel of the piston can only be accelerated when the governor moves slowly enough to raise the push-blade to the required height for contact with the end of lever G.

The swinging of weight I is regulated by a light spring m, which is located in a cavity in the lower portion of block H. A bearingm. A thumb-screw 0 is adjustable back and forth to vary the power of spring m, and when properly regulated this thumb-screwis locked in place against accidental dis-arrangement by a lock-nut, as p. The pressure of spring we must be overcome by the swinging weight before the latter can lower the push-blade, and the spring may be adjusted and locked, if desired, without stopping the engine, be ing easily accessible for that purpose. The governor may be adjusted to open the valve B at any desired speed of travel. The forward swing of the weight is limited by use of a stop q, affixed to the side of block H, as shown in Fig. 2.

To prevent the push-blade from slipping oif the lever once it has engaged it, the latter is supplied with a slight notch, into which the sharp edge of the pushblade forces itself when high enough for the purpose.

Being constructed and arranged substantially in accordance with the foregoing explanations, the improved governor is of few and simple parts, easily constructed and mounted, not liable to get outof order, and is well adapted to answer all the purposes or objects of the invention hereinbefore alluded to.

Having now fully described my invention, what I claim as new therein, and desire to secure by Letters Patent, is

In a gas-engine, the combination with a valve having a sliding stem, a nut thereon beyond its casing, an expansive spring between this nut and the casing, a pivoted lever having a tappet adapted to contact with the end of the stem to positively open the valve, and an expansive spring between the lever and nut around the tappet and the extremity of the stem and holding them normally apart; of a reciprocating rod, a foundation-piece thereon, a block hinged to the latter, a push-blade secured at one end to the block with its free end adapted to hit or miss said lever, a weight having a yoke provided with vertical arms pivoted to said foundationpiece and with horizonal arms connected by a cross-piece which latter sustains the pushblade in position to engage said lever, and a spring holding the weight and yoke normally in said position but permitting their movement under excessive speed so as to drop the free end of the push-blade and allow it to pass the lever.

In testimony whereof I have affixed my signature in presence of two witnesses.

HENRY .J. HARTIG.

Witnesses:

G. SEDGWIGK, WORTH Oseoon.

IIO 

